I'm not sure if Belarussians having to cancel their holidays to the West and going to Crimea instead is going to have the desired effect of driving sympathies among Belarussians toward the west.
Moreover the people who actually like Lukashenko will probably be pretty indifferent to this. They weren't planning on flying to Berlin any time soon. I'm almost certain Putin will jump on the chance to have alternate routes to Russian tourist destinations opened up (possibly even subsidized, like he did for flights to Crimea).
I'm starting to wonder if Lukashenko/Putin wasn't counting on this kind of knee jerk reaction. If sanctions were on the cards anyway, with this stunt they got to pick the timing, reason and type.
Edit : not a popular analysis, it seems...